Inner tire-cushion



1. WJAND e. F. BURGESS.

' INNER TIRE CUSHION, PPPPPP Aflou FILED AUG-9. 1920.

1,375,032. Patented A a-19,1921.

7 JOHN W. BURGESS AND GEORGE F. BURGESS, OF KANSAS CITY, MISSOURI.

INNER TIRE-CUSHION.

intense.

Specification of Letters Patent.

Patented Apr. 19, 1921.

ject to puncture and deterioration, may be dispensed with, and the present invention aims so to construct the filler that the same will have the necessary resiliency, combined with stability to resist lateral strains. It is withinthe province of the disclosure to improve generally and to enhance the utility of devices of that type to which the invention appertains.

With the above and other objects in view, which will appear asthe description proceeds, the invention resides in the co1nbination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understoodthat, within the scope of what is claimed, changes in the preciseembodiment of the invention shown can be made without departing from the spirit ofthe invention. v

In the accompanying drawings Figure 1 shows in cross section, adevice constructed in accordance with the invention; Fig. 2 is a section on the line 22 of Fig. l; and Fig. 3 is a section on the line 33 of Fig. 1.

The numeral 1 denotes a rim on which is mounted a casing 2. Within the casing is "located a filler preferably made of a pluralmade of canvas or other relatively inelastic ity of blocks 3, placed in end to'end abutment, the blocks conformingto the cross secvtional contour of the casing 2 and being made, ordinarily, of rubber or other resilient material. The blocks 3 are inclosed wlthln a tread band 4, the band a ordinarily being material. The band 4 is endless, andtends to limit the outward or centrlfugal movement of the blocks 8; Each block 3 is pro j M due to friction.

vided with one or more radial bores 5, extended part Way through the block, from the inner edge of the block toward the outer edge of the block thereof. Each block is provided, in its median plane with a slit 6 of less width than the bores 5, the slitintersecting the bores and being of substantially the same depth as the bores. When the blocks are placed in end to end abutment in the casing 2, the slits 6 of the blocks are alined, as shown clearly in Fig. 3 of the drawings.

The general construction of the device is such that it will possess the necessary resiliency, combined with stability to resist lateral strains.

The blocks 3 may be of any desired length. They are placed in the casing 2 until the easing is filled, circumferentially. Then, by compressing the blocks longitudinally, they may be expanded transversely, or fattened, thereby pulling the casing tightly and completel If desired, a strip of asbestos or other refractory I 25, may be placed in the slit 6, to prevent the slit from closing together, the strip 25 serving to prevent an overheating of the tire, The strip 25 does not fill the slit 6 completely, the major portion of the slit being open, adjacent to the axis of the filler. V 7

Having thus described the invention, what is claimed is 1- A tire filler having radial bores extended part way therethrough from the inner edge thereof toward the outer edge thereof,

and provided in its median plane with a slit of less width than the bores, the slit interthe same depth as the bores.

In testimony that we claim the foregoing as our own, we have hereto afiixed our signa tures in the presence of two witnesses.

J OHN-W. BURGESS.

GEORGE F. BURGESS.

lVitnesses:

T. ,P. CHAPMAN, .E. STEPHENSON. 

